Unfortunately, Marek's has found its way into numerous flocks in my area (including my own). My locally purchased and unvaccinated flock was ravaged with only 2 of 7 remaining. The 2 remaining pullets so far seem strong with no signs of illness; but wondering if it's just a matter of time before they succumb or if they're going to escape the disease. This year was my first time dealing with Marek's and have some questions: 1. - I've heard that once Marek's invades your property, that it is essentially a permanent fixture there. Is it at all likely that my 2 remaining hens (who have so signs of illness) will make it through this, or are they likely just waiting their turn? 2. - Anything to do about the disease? Any disinfectants that I can treat the coop/run/yard with to cleanse the property? 3. - Is it possible to add vaccinated chickens to rebuild my flock?